01 -
Preheat oven to 350°F (175°C). Place split English muffin halves cut-side up on a baking sheet and toast for 5–7 minutes until lightly golden. Allow to cool slightly.
02 -
Lightly grease a 9×13-inch baking dish. Arrange toasted muffin halves evenly, cut side up, to form a single layer base.
03 -
Distribute diced ham evenly over the English muffins. Sprinkle shredded cheddar, then parmesan cheese, ensuring even coverage.
04 -
In a large bowl, whisk together eggs, milk, heavy cream, green onions, dried mustard, salt, black pepper, and paprika (if using) until fully combined and smooth.
05 -
Pour the egg custard mixture evenly over the layered muffins, ham, and cheese, pressing down lightly to submerge all elements.
06 -
Cover the dish tightly and refrigerate for a minimum of 8 hours and up to 24 hours, allowing flavors to meld and the bread to absorb the custard.
07 -
Preheat oven to 350°F (175°C). Remove casserole from refrigerator and let it rest at room temperature for 15–20 minutes.
08 -
Uncover and bake for 45–55 minutes until set and lightly golden on top. Insert a knife in the center to check doneness—the blade should come out mostly clean.
09 -
If making from scratch, prepare Hollandaise sauce during baking. If using store-bought, heat gently until smooth and warm.
10 -
Once baked, let casserole rest briefly. Slice into portions. Drizzle each serving generously with warm Hollandaise sauce and garnish with chopped parsley if desired. Serve immediately.